I guess it's partially down to the fact that the said 28-300L was one of the (very) few high-end superzooms up until late, the rest are/were mostly low-end consumer fare anyway. I remember the Sigma 28-300 I've had to use back in the days of yore on Nikon D70; it was really pretty lousy all around. The Nikon 28-300 couldn't really hold a candle to the Canon either.
Now, if I buy a Nikon lens, I'd probably go for their 24-120, not 24-240. Although the Canon 24-85 looks pretty good even on Z9 so far - a lot better than it has any right to look if only the price tag and the lens's provenance are taken into account.
Now, if I buy a Nikon lens, I'd probably go for their 24-120, not 24-240. Although the Canon 24-85 looks pretty good even on Z9 so far - a lot better than it has any right to look if only the price tag and the lens's provenance are taken into account.